Ruisseau· 6 segments
Arlau
Crosses 2 administrative regions : Nordfriesland, Schleswig-Flensburg
Total length
37km
Max discharge
4,8m³/s
Max Strahler
2
Segments matched
6
River geography2 admin regions · 0 communes
2 administrative regions crossed (GADM L2)
- NordfrieslandSchleswig-Holstein · Germany32.4 kmin this dpt
- Schleswig-FlensburgSchleswig-Holstein · Germany0.0 kmin this dpt
12 intersecting protected areas
Ramsar-Gebiet S-H Wattenmeer und angrenzende Küstengebiete
IUCN Not ReportedSpecial Protection Area (Birds Directive)
S-H Wadden sea National Park
IUCN Not ReportedMarine Protected Area (OSPAR)
Wetland of International Importance (Ramsar Site)
NTP S-H Wattenmeer und angrenzende Küstengebiete
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Waddensea and Hallig Islands of Schleswig-Holstein
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
Nordfriesisches Wattenmeer
IUCN IVNature Reserve
Landscape Protection Area
Beltringharder Koog
IUCN IVNature Reserve
Immenstedter Wald
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3 more protected areassorted by area
Ahrenviölfelder Westermoor
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Ahrenviölfelder Westermoor
IUCN IVNature Reserve
Quell- und Niedermoore der Arlauniederung
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1 page = 1 named river (aggregation of 6 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
847 distinct species · 5 385 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Arlau : 27 espèces reliées par 161 interactions GloBI sur 6 types (connectance 19.6%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
37km
Max discharge
4,8m³/s
Max Strahler
2
Segments matched
6
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.